Mikaeus, the Unhallowed, Ashnod's Altar, and Encumbered Reejerey

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Ashnod's Altar on the battlefield
• Encumbered Reejerey on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Encumbered Reejerey
2. When Encumbered Reejerey dies, its undying ability triggers, returning it from your graveyard to the battlefield without a +1/+1 counter on it due to its replacement effect
3. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite death triggers
• Infinite sacrifice triggers